Variables: dissolved_oygen total_organic_carbon electric_conductivity concentration Substances: 4-Formylaminoantipyrin (4-FAA) (WSJBSKRPKADYRQ-UHFFFAOYSA-N) 1-Naphthylacetic acid (PRPINYUDVPFIRX-UHFFFAOYSA-N) Keywords: high resolution mass spectrometry MetFrag monitoring pesticides metabolites